Heat Controller, Inc. | VMH Series | Service Manual |
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8.4.3.5 High evaporator coil temp.T2 protection:
(1) T2>TEH2 compressor running frequency decreases to the lower level every 20s. If the frequency decreased to F2 and the T2 still over TEH2 for 3 minutes, the compressor will stop. If T2 deceased to lower than 118°F/48°C, or 118°F/48°C <T2< TEH2 last for 6 minutes, release the frequency limit control.
Unit | °F TEH2 (°C) | |
9K/12K | 127°F | 53°C |
18K /24K | 131°F | 55°C |
(2) If T2>140°F/0°C, the compressor stops and restarts when T2<118°F/48°C
8.4.4 Auto-mode
This mode can be selected by the remote control and the set temperature can be changed between 17~86°F/62°C.
In auto mode, the machine will select cooling, heating or
Indoor fan will run in auto fan of the relevant mode.
The louver operates the same as in relevant mode.
If the machine switches mode between heating and cooling, the compressor will stop for 15 minutes and then choose mode according to
If the set temperature is modified, the unit will choose run function again.
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